Vapor-lamp.



No. 799,581.- PATENTBD SEPT. 12, 1905.

G. E. TREW'HELLA.

VAPOR LAMP.

APPLIOATION FILED MAY 9, 1905.

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VAPOR LAMP.

APPLICATION FILED MAY 9, 1905.

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CHARLES E. TREWHELLA, OF MERIDEN, CONNECTICUT, ASSIGNOR TO AMERICAN SILVER COMPANY, OF BRISTOL, CONNECTICUT, A CORPO- RATION.

VAPOR-LAMP.

Specification of Letters Patent.

Patented Sept. 12, 1905.

To all whom it may concern/.-

Be it known that I, CHARLES E.TREWHELLA, acitizen of the United States, residing at Meriden, in the county of New Haven and State of 5 Connecticut, have invented certain new and useful Improvements in Vapor Lamps, of which the following is a specification.

My invention relates to improvements in vapor-lam ps for heating chafing-dishes, coffeepercolators, and the like; and the objects of my improvement are simplicity and economy in construction, with convenience and efficiency in use, particularly with reference to a simple and effective cut-off valve and to the 5 construction for preventing the lamp from being excessively heated.

In the accompanying drawings, Figure 1 is a plan view of my lamp. Fig. 2 is a vertical section of the same on the offset line 0 a: of Fig. 1. Fig. 3 is a side elevation of the same. Fig. 4 is a detached sectional elevation of the valve and connected parts on the line y of Fig. 2. Fig. 5 is a plan view of my lamp in a modified form and on the same scale as Fig. 1. Fig. 6 is a sectional elevation of the same on the line a a of Fig. 5.

The lamp-font A and its top 7 are or may be of any ordinary construction. On the top 7 and concentric with the font I mount a fiaring or bell-shaped wick-tube 8, with its bellshaped end forming an enlargement 27 of the wick-receptacle at the top. I close the upper end of the said enlargement by a plate or cap 9. A valve-tube 10, having a perforated end 11, that forms a valve-seat, is extended from the lamp-font upwardly through the enlarged or bell-shaped upper end of the wicktube, the upper end of the said valve-tube extending upwardly above the top plate or cap 9. That portion of the valve-tube that passes through the wick-tube is provided with one or more orifices 12 to admit gas from the wick-receptacle into the valve-tube. A plate 13, which serves as a jet-ring base, is mounted at the upper end of the valve-tube and at a distance from the cap 9 of the wick-tube, so that air can flow freely under the said plate 13 and up through its central opening or openings 14:. This plate 13 may be additionally supported in place by means of any Suitable standard 15. The plate 13 is perfoof a slide 19 and ball 20, loosely mounted in' a socket in the upper end of the slide. The body of the slide is round to lit the valvetube, and its lower end is provided with a rack 21. A sleeve or tubular bearing 22 is mounted on the lamp-font and carries an operating-rod 23, having a knob or thumb-turn 24: at one end anda pinion 25 at itsother for engaging the rack of the valve-slide. The upper portion of the wick-tube is filled with any ordinary form of wick or wicks 26, that pass down through the top plate into the font through one or more openings -in the said top plate.

In the modified form shown in Figs. 5 and 6 I employ the same Valve and operating-rod as before with the same reference-numerals. The top plate 7 of the font A is of asomewhat difierent form. I employ two wicktubes 8 instead of only one and mount them over suitable openings on the top plate on diametrically opposite sides. I surmount each tube 8 with wick-receptacle 27, preferably of a round form, but of much less diameter than the jet-ring 16*. I cover each wick-receptacle with a cap 9, so as to close the top of the said receptacle. The valvetube lies in between the two wick-receptacles and closely'to the sides thereof, so that .the valve-tube may communicate with the inte rior of the wick-receptacles by means of holes that register with the holes 12 in the sides of the valve-tube. The jet-ring base 13 rests directly on the top of the wick-receptacles, but these receptacles are so small that a large portion of the jet-ring base is left exposed to the atmosphere. A curved plate 28 spans the middle of the jet-ring and passes over the valve-seat, the ends of the said plate opening into the jet-ring on each side, so that gas can flow from the valve through the channel formed by the said curved plate and middle portion of the jetring base into the jet-ring. Openings 14L, Fig. 5, are in the jet-ring base 13, so that the atmosphere may pass under the jet-ring and up through the center thereof. The wick-tubes and wick-receptacles are filled with any suitable wick or wicks 26.

The font is supplied with any suitable fluid for generating a gas or vaporas, for example, alcohol. The operating-rod is turned so as to lower the valve-slide and valve to open the passages 12 from the wick-tube or wickreceptacles into the valve-tube and upper end 11 of the valve-tube to the interior of the jet-ring. Heat is applied in any ordinary manner to the upper portion of the confined wicks to generate a gas which may be ignited as it flows from the jets in the jet-ring. I/Vhen once started, the flame at the jet-ring gives the requisite heat to generate gas, so that the lamp burns as long as gas passes into the ring through the valve-seat. In order to stop the flame, the valve is forced upwardly to its seat by means of the thumb-turn and connected parts into the position shown in Figs. 2, 4E, and 6. The ball should be sufficiently loose in its socket in the end of the valve-slide that it may move a little to either side and seat itself squarely on the valveseat so as to wholly cut off the gas. The valvetube serves as a suitable guide for. the valve-slide and also as a conductor through which the gas passes from the wiclotube to the valve-seat. The flame will vanish immediately after closing the valve. It is essential that the valve shall close tightly; otherwise the flame would not be extinguished. Ordinarily there will be friction enough, especially after the lamp has been used, to make the slide and valve stay in whatever position they may be set; but it is immaterial after the flame is once extinguished whether the valve stays up or not, except that it must be opened before the lamp is used again. In both constructions the atmosphere is admitted to the central portion of the jet-ring to insure perfect combustion. In the construction first described the whole under side of the jetring (except that occupied by the valve-tube) is open to the atmosphere for a considerable distance above the wick-tube, so that air passes freely under the jet-ring base and up through the center of the jet-ring, with a continual tendency to reduce the heat and prevent the lamp-font from being heated to the same extent that it would be if such provision for passing air under the ring was not made. At the same time there is ample heat for generating gas. In the construction shown in \Figs. 5 and 6 the atmosphere freely passes up under a large portion of the jet-ring and up through the ring for the same purpose.

I claim as my invention 1. In a vapor-lamp having a font, a single wick-tube mounted on-the said font and having an enlarged upper end forming a wick-receptacle,a cap-plate covering the top of the said receptacle, a jet-ring base elevated above the said cap-plate with an air-space between, a jet-ring mounted on the said base, a valvetube having a valve-seat at its upper end that opens into the said jet-ring, the said tube also opening into the wick-receptacle and a valve for closing the opening through the said valve-seat.

2. In a vapor-lamp having a font, a single wick-tube mounted on the said font and having a bell-shaped upper end, a cap-plate covering the top of the said bell-shaped upper end, a valve-tube extending from the lamp-font upwardly through the wick-tube at one side thereof and having perforations opening into the wick-tube and a valve-seat opening upwardly from the upper end of the said valvetube, a jet-ring and base mounted on the upper end of the said valve-tube with a space between it and the top of the said bell-shaped upper end, a valve-slide and valve within the said valve-tube and means for operating the said valve-slide.

3. In a vapor-lamp having a font, a wicktube mounted on the said font and having an enlargement at its upper end, a cap-plate covering the upper side of thesaid enlarged end, a jet-ring, a jet-ring base for closing the under side of the said jet-ring with provision for air to pass upward through the said base inside of the jet-ring, the said jet-ring and base being mounted above the cap-plate of the wick-tube with an air-space directly under the jet-ring base and through the central portion thereof, a perforated valve-seat communicating with the interior of the jet-ring, a conductor having a passage for gas leading from the enlargement in the wick-tube to the said valve-seat, a valve, and operating devices for closing the opening through the said valve-seat.

4. In a vapor-lamp having a font, a wicktube mounted on the said font and having a wick-receptacle at its upper end, a jet-ring base, a jet-ring mounted on the said base, a vertical valve-tube communicating with the wick-receptacle and having a perforated valveseat at its upper end communicating with the said jet-ring. a valve-slide mounted in the said valve-tube and having a ball-valve loosely mounted in its upper end to act on the said Valve-seat, and means for operating the said valve-slide.

5. In a vapor-lamp having a font, a wicktube mounted on the said font and having a wick-receptacle at its upper end, a jet-ring base, a jet-ring mounted on the said base, a vertical valve-tube communicating with the wick-receptacleandhavingaperforated Valve- With the said rack, a horizontal operating seat at its upper end communicating with the rod for said pinion and a bearing for the said said jet-ring, a valve-slide mounted in the operating-rod mounted on the lamp.

said valve-tube and havingaball-valve loosely CHARLES E. TREWHELLA. 5 mounted in its upper end to act on the said Witnesses:

valve-seat, a rack extending longitudinally of FRED E. POTTER,

the said valve-slide, a pinion in engagement JAMES SHEPARD. 

